target-sh4/cpu.h

   1 /*
   2  *  SH4 emulation
   3  *
   4  *  Copyright (c) 2005 Samuel Tardieu
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef SH4_CPU_H
  21 #define SH4_CPU_H
  22
  23 #include "qemu-common.h"
  24 #include "cpu-qom.h"
  25
  26 #define TARGET_LONG_BITS 32
  27
  28 /* CPU Subtypes */
  29 #define SH_CPU_SH7750  (1 << 0)
  30 #define SH_CPU_SH7750S (1 << 1)
  31 #define SH_CPU_SH7750R (1 << 2)
  32 #define SH_CPU_SH7751  (1 << 3)
  33 #define SH_CPU_SH7751R (1 << 4)
  34 #define SH_CPU_SH7785  (1 << 5)
  35 #define SH_CPU_SH7750_ALL (SH_CPU_SH7750 | SH_CPU_SH7750S | SH_CPU_SH7750R)
  36 #define SH_CPU_SH7751_ALL (SH_CPU_SH7751 | SH_CPU_SH7751R)
  37
  38 #define CPUArchState struct CPUSH4State
  39
  40 #include "exec/cpu-defs.h"
  41
  42 #include "fpu/softfloat.h"
  43
  44 #define TARGET_PAGE_BITS 12     /* 4k XXXXX */
  45
  46 #define TARGET_PHYS_ADDR_SPACE_BITS 32
  47 #define TARGET_VIRT_ADDR_SPACE_BITS 32
  48
  49 #define SR_MD 30
  50 #define SR_RB 29
  51 #define SR_BL 28
  52 #define SR_FD 15
  53 #define SR_M  9
  54 #define SR_Q  8
  55 #define SR_I3 7
  56 #define SR_I2 6
  57 #define SR_I1 5
  58 #define SR_I0 4
  59 #define SR_S  1
  60 #define SR_T  0
  61
  62 #define FPSCR_MASK             (0x003fffff)
  63 #define FPSCR_FR               (1 << 21)
  64 #define FPSCR_SZ               (1 << 20)
  65 #define FPSCR_PR               (1 << 19)
  66 #define FPSCR_DN               (1 << 18)
  67 #define FPSCR_CAUSE_MASK       (0x3f << 12)
  68 #define FPSCR_CAUSE_SHIFT      (12)
  69 #define FPSCR_CAUSE_E          (1 << 17)
  70 #define FPSCR_CAUSE_V          (1 << 16)
  71 #define FPSCR_CAUSE_Z          (1 << 15)
  72 #define FPSCR_CAUSE_O          (1 << 14)
  73 #define FPSCR_CAUSE_U          (1 << 13)
  74 #define FPSCR_CAUSE_I          (1 << 12)
  75 #define FPSCR_ENABLE_MASK      (0x1f << 7)
  76 #define FPSCR_ENABLE_SHIFT     (7)
  77 #define FPSCR_ENABLE_V         (1 << 11)
  78 #define FPSCR_ENABLE_Z         (1 << 10)
  79 #define FPSCR_ENABLE_O         (1 << 9)
  80 #define FPSCR_ENABLE_U         (1 << 8)
  81 #define FPSCR_ENABLE_I         (1 << 7)
  82 #define FPSCR_FLAG_MASK        (0x1f << 2)
  83 #define FPSCR_FLAG_SHIFT       (2)
  84 #define FPSCR_FLAG_V           (1 << 6)
  85 #define FPSCR_FLAG_Z           (1 << 5)
  86 #define FPSCR_FLAG_O           (1 << 4)
  87 #define FPSCR_FLAG_U           (1 << 3)
  88 #define FPSCR_FLAG_I           (1 << 2)
  89 #define FPSCR_RM_MASK          (0x03 << 0)
  90 #define FPSCR_RM_NEAREST       (0 << 0)
  91 #define FPSCR_RM_ZERO          (1 << 0)
  92
  93 #define DELAY_SLOT             (1 << 0)
  94 #define DELAY_SLOT_CONDITIONAL (1 << 1)
  95 #define DELAY_SLOT_TRUE        (1 << 2)
  96 #define DELAY_SLOT_CLEARME     (1 << 3)
  97 /* The dynamic value of the DELAY_SLOT_TRUE flag determines whether the jump
  98  * after the delay slot should be taken or not. It is calculated from SR_T.
  99  *
 100  * It is unclear if it is permitted to modify the SR_T flag in a delay slot.
 101  * The use of DELAY_SLOT_TRUE flag makes us accept such SR_T modification.
 102  */
 103
 104 typedef struct tlb_t {
 105     uint32_t vpn;               /* virtual page number */
 106     uint32_t ppn;               /* physical page number */
 107     uint32_t size;              /* mapped page size in bytes */
 108     uint8_t asid;               /* address space identifier */
 109     uint8_t v:1;                /* validity */
 110     uint8_t sz:2;               /* page size */
 111     uint8_t sh:1;               /* share status */
 112     uint8_t c:1;                /* cacheability */
 113     uint8_t pr:2;               /* protection key */
 114     uint8_t d:1;                /* dirty */
 115     uint8_t wt:1;               /* write through */
 116     uint8_t sa:3;               /* space attribute (PCMCIA) */
 117     uint8_t tc:1;               /* timing control */
 118 } tlb_t;
 119
 120 #define UTLB_SIZE 64
 121 #define ITLB_SIZE 4
 122
 123 #define NB_MMU_MODES 2
 124 #define TARGET_INSN_START_EXTRA_WORDS 1
 125
 126 enum sh_features {
 127     SH_FEATURE_SH4A = 1,
 128     SH_FEATURE_BCR3_AND_BCR4 = 2,
 129 };
 130
 131 typedef struct memory_content {
 132     uint32_t address;
 133     uint32_t value;
 134     struct memory_content *next;
 135 } memory_content;
 136
 137 typedef struct CPUSH4State {
 138     uint32_t flags;             /* general execution flags */
 139     uint32_t gregs[24];         /* general registers */
 140     float32 fregs[32];          /* floating point registers */
 141     uint32_t sr;                /* status register (with T split out) */
 142     uint32_t sr_m;              /* M bit of status register */
 143     uint32_t sr_q;              /* Q bit of status register */
 144     uint32_t sr_t;              /* T bit of status register */
 145     uint32_t ssr;               /* saved status register */
 146     uint32_t spc;               /* saved program counter */
 147     uint32_t gbr;               /* global base register */
 148     uint32_t vbr;               /* vector base register */
 149     uint32_t sgr;               /* saved global register 15 */
 150     uint32_t dbr;               /* debug base register */
 151     uint32_t pc;                /* program counter */
 152     uint32_t delayed_pc;        /* target of delayed jump */
 153     uint32_t mach;              /* multiply and accumulate high */
 154     uint32_t macl;              /* multiply and accumulate low */
 155     uint32_t pr;                /* procedure register */
 156     uint32_t fpscr;             /* floating point status/control register */
 157     uint32_t fpul;              /* floating point communication register */
 158
 159     /* float point status register */
 160     float_status fp_status;
 161
 162     /* Those belong to the specific unit (SH7750) but are handled here */
 163     uint32_t mmucr;             /* MMU control register */
 164     uint32_t pteh;              /* page table entry high register */
 165     uint32_t ptel;              /* page table entry low register */
 166     uint32_t ptea;              /* page table entry assistance register */
 167     uint32_t ttb;               /* tranlation table base register */
 168     uint32_t tea;               /* TLB exception address register */
 169     uint32_t tra;               /* TRAPA exception register */
 170     uint32_t expevt;            /* exception event register */
 171     uint32_t intevt;            /* interrupt event register */
 172
 173     tlb_t itlb[ITLB_SIZE];      /* instruction translation table */
 174     tlb_t utlb[UTLB_SIZE];      /* unified translation table */
 175
 176     uint32_t ldst;
 177
 178     CPU_COMMON
 179
 180     /* Fields from here on are preserved over CPU reset. */
 181     int id;                     /* CPU model */
 182
 183     /* The features that we should emulate. See sh_features above.  */
 184     uint32_t features;
 185
 186     void *intc_handle;
 187     int in_sleep;               /* SR_BL ignored during sleep */
 188     memory_content *movcal_backup;
 189     memory_content **movcal_backup_tail;
 190 } CPUSH4State;
 191
 192 /**
 193  * SuperHCPU:
 194  * @env: #CPUSH4State
 195  *
 196  * A SuperH CPU.
 197  */
 198 struct SuperHCPU {
 199     /*< private >*/
 200     CPUState parent_obj;
 201     /*< public >*/
 202
 203     CPUSH4State env;
 204 };
 205
 206 static inline SuperHCPU *sh_env_get_cpu(CPUSH4State *env)
 207 {
 208     return container_of(env, SuperHCPU, env);
 209 }
 210
 211 #define ENV_GET_CPU(e) CPU(sh_env_get_cpu(e))
 212
 213 #define ENV_OFFSET offsetof(SuperHCPU, env)
 214
 215 void superh_cpu_do_interrupt(CPUState *cpu);
 216 bool superh_cpu_exec_interrupt(CPUState *cpu, int int_req);
 217 void superh_cpu_dump_state(CPUState *cpu, FILE *f,
 218                            fprintf_function cpu_fprintf, int flags);
 219 hwaddr superh_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
 220 int superh_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
 221 int superh_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 222
 223 void sh4_translate_init(void);
 224 SuperHCPU *cpu_sh4_init(const char *cpu_model);
 225 int cpu_sh4_signal_handler(int host_signum, void *pinfo,
 226                            void *puc);
 227 int superh_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int rw,
 228                                 int mmu_idx);
 229
 230 void sh4_cpu_list(FILE *f, fprintf_function cpu_fprintf);
 231 #if !defined(CONFIG_USER_ONLY)
 232 void cpu_sh4_invalidate_tlb(CPUSH4State *s);
 233 uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
 234                                        hwaddr addr);
 235 void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, hwaddr addr,
 236                                     uint32_t mem_value);
 237 uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
 238                                        hwaddr addr);
 239 void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, hwaddr addr,
 240                                     uint32_t mem_value);
 241 uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
 242                                        hwaddr addr);
 243 void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, hwaddr addr,
 244                                     uint32_t mem_value);
 245 uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
 246                                        hwaddr addr);
 247 void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, hwaddr addr,
 248                                     uint32_t mem_value);
 249 #endif
 250
 251 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr);
 252
 253 void cpu_load_tlb(CPUSH4State * env);
 254
 255 #define cpu_init(cpu_model) CPU(cpu_sh4_init(cpu_model))
 256
 257 #define cpu_signal_handler cpu_sh4_signal_handler
 258 #define cpu_list sh4_cpu_list
 259
 260 /* MMU modes definitions */
 261 #define MMU_MODE0_SUFFIX _kernel
 262 #define MMU_MODE1_SUFFIX _user
 263 #define MMU_USER_IDX 1
 264 static inline int cpu_mmu_index (CPUSH4State *env, bool ifetch)
 265 {
 266     return (env->sr & (1u << SR_MD)) == 0 ? 1 : 0;
 267 }
 268
 269 #include "exec/cpu-all.h"
 270
 271 /* Memory access type */
 272 enum {
 273     /* Privilege */
 274     ACCESS_PRIV = 0x01,
 275     /* Direction */
 276     ACCESS_WRITE = 0x02,
 277     /* Type of instruction */
 278     ACCESS_CODE = 0x10,
 279     ACCESS_INT = 0x20
 280 };
 281
 282 /* MMU control register */
 283 #define MMUCR    0x1F000010
 284 #define MMUCR_AT (1<<0)
 285 #define MMUCR_TI (1<<2)
 286 #define MMUCR_SV (1<<8)
 287 #define MMUCR_URC_BITS (6)
 288 #define MMUCR_URC_OFFSET (10)
 289 #define MMUCR_URC_SIZE (1 << MMUCR_URC_BITS)
 290 #define MMUCR_URC_MASK (((MMUCR_URC_SIZE) - 1) << MMUCR_URC_OFFSET)
 291 static inline int cpu_mmucr_urc (uint32_t mmucr)
 292 {
 293     return ((mmucr & MMUCR_URC_MASK) >> MMUCR_URC_OFFSET);
 294 }
 295
 296 /* PTEH : Page Translation Entry High register */
 297 #define PTEH_ASID_BITS (8)
 298 #define PTEH_ASID_SIZE (1 << PTEH_ASID_BITS)
 299 #define PTEH_ASID_MASK (PTEH_ASID_SIZE - 1)
 300 #define cpu_pteh_asid(pteh) ((pteh) & PTEH_ASID_MASK)
 301 #define PTEH_VPN_BITS (22)
 302 #define PTEH_VPN_OFFSET (10)
 303 #define PTEH_VPN_SIZE (1 << PTEH_VPN_BITS)
 304 #define PTEH_VPN_MASK (((PTEH_VPN_SIZE) - 1) << PTEH_VPN_OFFSET)
 305 static inline int cpu_pteh_vpn (uint32_t pteh)
 306 {
 307     return ((pteh & PTEH_VPN_MASK) >> PTEH_VPN_OFFSET);
 308 }
 309
 310 /* PTEL : Page Translation Entry Low register */
 311 #define PTEL_V        (1 << 8)
 312 #define cpu_ptel_v(ptel) (((ptel) & PTEL_V) >> 8)
 313 #define PTEL_C        (1 << 3)
 314 #define cpu_ptel_c(ptel) (((ptel) & PTEL_C) >> 3)
 315 #define PTEL_D        (1 << 2)
 316 #define cpu_ptel_d(ptel) (((ptel) & PTEL_D) >> 2)
 317 #define PTEL_SH       (1 << 1)
 318 #define cpu_ptel_sh(ptel)(((ptel) & PTEL_SH) >> 1)
 319 #define PTEL_WT       (1 << 0)
 320 #define cpu_ptel_wt(ptel) ((ptel) & PTEL_WT)
 321
 322 #define PTEL_SZ_HIGH_OFFSET  (7)
 323 #define PTEL_SZ_HIGH  (1 << PTEL_SZ_HIGH_OFFSET)
 324 #define PTEL_SZ_LOW_OFFSET   (4)
 325 #define PTEL_SZ_LOW   (1 << PTEL_SZ_LOW_OFFSET)
 326 static inline int cpu_ptel_sz (uint32_t ptel)
 327 {
 328     int sz;
 329     sz = (ptel & PTEL_SZ_HIGH) >> PTEL_SZ_HIGH_OFFSET;
 330     sz <<= 1;
 331     sz |= (ptel & PTEL_SZ_LOW) >> PTEL_SZ_LOW_OFFSET;
 332     return sz;
 333 }
 334
 335 #define PTEL_PPN_BITS (19)
 336 #define PTEL_PPN_OFFSET (10)
 337 #define PTEL_PPN_SIZE (1 << PTEL_PPN_BITS)
 338 #define PTEL_PPN_MASK (((PTEL_PPN_SIZE) - 1) << PTEL_PPN_OFFSET)
 339 static inline int cpu_ptel_ppn (uint32_t ptel)
 340 {
 341     return ((ptel & PTEL_PPN_MASK) >> PTEL_PPN_OFFSET);
 342 }
 343
 344 #define PTEL_PR_BITS   (2)
 345 #define PTEL_PR_OFFSET (5)
 346 #define PTEL_PR_SIZE (1 << PTEL_PR_BITS)
 347 #define PTEL_PR_MASK (((PTEL_PR_SIZE) - 1) << PTEL_PR_OFFSET)
 348 static inline int cpu_ptel_pr (uint32_t ptel)
 349 {
 350     return ((ptel & PTEL_PR_MASK) >> PTEL_PR_OFFSET);
 351 }
 352
 353 /* PTEA : Page Translation Entry Assistance register */
 354 #define PTEA_SA_BITS (3)
 355 #define PTEA_SA_SIZE (1 << PTEA_SA_BITS)
 356 #define PTEA_SA_MASK (PTEA_SA_SIZE - 1)
 357 #define cpu_ptea_sa(ptea) ((ptea) & PTEA_SA_MASK)
 358 #define PTEA_TC        (1 << 3)
 359 #define cpu_ptea_tc(ptea) (((ptea) & PTEA_TC) >> 3)
 360
 361 #define TB_FLAG_PENDING_MOVCA  (1 << 4)
 362
 363 static inline target_ulong cpu_read_sr(CPUSH4State *env)
 364 {
 365     return env->sr | (env->sr_m << SR_M) |
 366                      (env->sr_q << SR_Q) |
 367                      (env->sr_t << SR_T);
 368 }
 369
 370 static inline void cpu_write_sr(CPUSH4State *env, target_ulong sr)
 371 {
 372     env->sr_m = (sr >> SR_M) & 1;
 373     env->sr_q = (sr >> SR_Q) & 1;
 374     env->sr_t = (sr >> SR_T) & 1;
 375     env->sr = sr & ~((1u << SR_M) | (1u << SR_Q) | (1u << SR_T));
 376 }
 377
 378 static inline void cpu_get_tb_cpu_state(CPUSH4State *env, target_ulong *pc,
 379                                         target_ulong *cs_base, uint32_t *flags)
 380 {
 381     *pc = env->pc;
 382     *cs_base = 0;
 383     *flags = (env->flags & (DELAY_SLOT | DELAY_SLOT_CONDITIONAL
 384                     | DELAY_SLOT_TRUE | DELAY_SLOT_CLEARME))   /* Bits  0- 3 */
 385             | (env->fpscr & (FPSCR_FR | FPSCR_SZ | FPSCR_PR))  /* Bits 19-21 */
 386             | (env->sr & ((1u << SR_MD) | (1u << SR_RB)))      /* Bits 29-30 */
 387             | (env->sr & (1u << SR_FD))                        /* Bit 15 */
 388             | (env->movcal_backup ? TB_FLAG_PENDING_MOVCA : 0); /* Bit 4 */
 389 }
 390
 391 #endif /* SH4_CPU_H */